39572965 clusters
Max cluster size: 20

Cluster Size Distribution
1	8216568
2	21477254
3	9874736
4	3284
5	672
6	289
7	94
8	35
9	17
10	8
11	5
12	2
20	1

Cluster Type Distribution
frozenset({('PMID', 1), ('DOI', 1), ('PMC', 6)})	1
frozenset({('PMID', 1), ('PMC', 5), ('DOI', 6)})	1
frozenset({('PMID', 1), ('PMC', 10), ('DOI', 1)})	1
frozenset({('PMC', 8), ('PMID', 1), ('DOI', 1)})	1
frozenset({('PMC', 3), ('PMID', 1), ('DOI', 6)})	1
frozenset({('PMID', 1), ('DOI', 5), ('PMC', 2)})	1
frozenset({('PMID', 1), ('PMC', 9), ('DOI', 10)})	1
frozenset({('PMC', 3), ('PMID', 1), ('DOI', 2)})	2
frozenset({('PMID', 1), ('PMC', 4), ('DOI', 6)})	2
frozenset({('PMID', 1), ('PMC', 1), ('DOI', 4)})	3
frozenset({('PMID', 1), ('PMC', 4), ('DOI', 1)})	3
frozenset({('PMID', 1), ('DOI', 5), ('PMC', 5)})	3
frozenset({('PMID', 1), ('PMC', 2)})	4
frozenset({('PMID', 1), ('PMC', 4), ('DOI', 5)})	6
frozenset({('PMC', 3), ('PMID', 1), ('DOI', 5)})	8
frozenset({('PMID', 1), ('PMC', 4), ('DOI', 4)})	9
frozenset({('PMC', 3), ('PMID', 1), ('DOI', 1)})	9
frozenset({('PMID', 1), ('DOI', 4), ('PMC', 2)})	15
frozenset({('PMC', 3), ('PMID', 1), ('DOI', 4)})	33
frozenset({('PMC', 3), ('PMID', 1), ('DOI', 3)})	79
frozenset({('PMID', 1), ('PMC', 1), ('DOI', 3)})	114
frozenset({('PMID', 1), ('DOI', 3), ('PMC', 2)})	281
frozenset({('PMID', 1), ('DOI', 1), ('PMC', 2)})	341
frozenset({('PMID', 1), ('DOI', 2), ('PMC', 2)})	549
frozenset({('PMID', 1), ('DOI', 2)})	577
frozenset({('PMID', 1), ('PMC', 1), ('DOI', 2)})	2943
frozenset({('PMID', 1), ('PMC', 1)})	712707
frozenset({('PMID', 1)})	8216568
frozenset({('PMID', 1), ('DOI', 1), ('PMC', 1)})	9874155
frozenset({('PMID', 1), ('DOI', 1)})	20764547